Mrs. Gutierrez has 6 classes. In each class, 3 students did not pass the exam. If 12% of all her students failed the last exam, How many students does Mrs. Gutierrez teach?

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.